A policeman arranges weapons seized after an attack on Jinnah International Airport in Karachi. Credit: Reuters\Athar Hussain

A further seven bodies have been recovered from a burned out building at Karachi international airport, bringing the death toll from the weekend attack to 36 - including 10 Taliban gunmen - Pakistani officials have said.

Dr Seemi Jamali, from the city's Jinnah Hospital, said the the charred remains of seven victims were taken there this morning.

The head of the Karachi Municipal Corporation, Rauf Akhtar Farooqi, said the bodies were burned beyond recognition. They were recovered from a cold storage unit at the airport but it is unclear how they ended up in it.

Gunmen disguised as police guards stormed the international terminal in Karachi, set off explosions and killed 18 people. All 10 gunmen died in the battle.

The Pakistan Taliban claimed responsibility for the attack, saying the assault was revenge for army airstrikes on their strongholds near the Afghan border and the the killing of Hakimullah Mehsud, the Taliban chief who died in a drone strike last November.